Gets the collection of group specifiers using the TimeUnits enumeration. The index of each specifier indicates (level-1). Specifiers modified using the collection Add, Insert and Remove methods of the collection. If no values are specified, values are automatically selected based on the range.

'Declaration
 
Public ReadOnly Property GroupTypes As ObservableCollection(Of TimeUnits)

'Usage
 
Dim instance As DateTimeGroupProvider
Dim value As ObservableCollection(Of TimeUnits)
 
value = instance.GroupTypes

public ObservableCollection<TimeUnits> GroupTypes {get;}